What is the working principle of oil cylinder?

Working principle: As an executive element, the hydraulic cylinder is essentially an energy-gathering conversion device. The hydraulic cylinder converts the pressure energy of the input liquid into the mechanical energy of the linear motion of the piston.

The so-called input hydraulic energy refers to the flow and pressure of the input liquid, while the output mechanical energy refers to the speed v(m/s) and traction force f when the piston moves. These parameters are realized by changing the working volume, so the hydraulic cylinder is a positive displacement actuator.

Hydraulic cylinders have different structures and different performances. According to its hydraulic pressure, it can be divided into single-acting hydraulic cylinder and double-acting hydraulic cylinder; According to its structural characteristics, it can be divided into plunger hydraulic cylinder, piston hydraulic cylinder, telescopic hydraulic cylinder and swing hydraulic cylinder.

Extended data

Precautions for disassembly and assembly of oil cylinder:

1. Before removing the hydraulic cylinder, release the pressure in the hydraulic circuit.

2. During disassembly, the piston rod top thread, oil port thread, piston rod surface and cylinder liner inner wall should be prevented from being damaged.

3. Disassembly shall be carried out in sequence.

4. Before and after unloading, try to create conditions to prevent the parts of the hydraulic cylinder from being polluted by the surrounding dust and impurities.

5. Carefully check the oil cylinder after disassembly to determine which parts can continue to be used, which parts can be repaired before use, and which parts must be replaced.

6. Before assembly, all parts must be carefully cleaned.

7, to correctly install the sealing device everywhere.

8. A special wrench should be used when screwing the threaded joint, and the torque should meet the standard requirements.

9. After the piston and piston rod are assembled, try to measure the out-of-tolerance of their coaxiality and straightness in the whole length.

10. When the piston assembly moves after assembly, there should be no jamming feeling and uneven resistance.

1 1. When the hydraulic cylinder is installed on the main engine, the oil inlet and outlet joints must be directly sealed and fastened to prevent oil leakage.

12. After assembly as required, it should be reciprocated several times at low pressure to remove the gas in the cylinder.

Baidu encyclopedia-hydraulic cylinder (mechanical equipment) = hydraulic cylinder